92 lines
2.3 KiB
PHP
92 lines
2.3 KiB
PHP
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<?php
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/**
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* Cache with file system
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*/
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class FileCache extends CacheAbstract{
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protected $cacheDirCreated; // boolean to avoid always chck dir cache existance
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public function loadData(){
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$this->isPrepareCache();
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$datas = json_decode(file_get_contents($this->getCacheFile()),true);
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$items = array();
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foreach($datas as $aData){
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$item = new \Item();
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foreach($aData as $name => $value){
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$item->$name = $value;
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}
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$items[] = $item;
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}
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return $items;
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}
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public function saveData($datas){
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$this->isPrepareCache();
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file_put_contents($this->getCacheFile(), json_encode($datas));
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return $this;
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}
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public function getTime(){
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$this->isPrepareCache();
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$cacheFile = $this->getCacheFile();
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if( file_exists($cacheFile) ){
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return filemtime($cacheFile);
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}
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return false;
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}
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/**
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* Cache is prepared ?
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* Note : Cache name is based on request information, then cache must be prepare before use
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* @return \Exception|true
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*/
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protected function isPrepareCache(){
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if( is_null($this->param) ){
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throw new \Exception('Please feed "prepare" method before try to load');
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}
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return true;
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}
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/**
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* Return cache path (and create if not exist)
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* @return string Cache path
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*/
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protected function getCachePath(){
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$cacheDir = __DIR__ . '/../cache/'; // FIXME : configuration ?
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// FIXME : implement recursive dir creation
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if( is_null($this->cacheDirCreated) && !is_dir($cacheDir) ){
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$this->cacheDirCreated = true;
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mkdir($cacheDir,0705);
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chmod($cacheDir,0705);
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}
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return $cacheDir;
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}
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/**
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* Get the file name use for cache store
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* @return string Path to the file cache
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*/
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protected function getCacheFile(){
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return $this->getCachePath() . $this->getCacheName();
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}
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/**
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* Determines file name for store the cache
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* return string
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*/
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protected function getCacheName(){
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$this->isPrepareCache();
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$stringToEncode = $_SERVER['REQUEST_URI'] . http_build_query($this->param);
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return hash('sha1', $stringToEncode) . '.cache';
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}
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}
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